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/*
* Module: lbdata.cc
*
* **** License ****
* Version: VPL 1.0
*
* The contents of this file are subject to the Vyatta Public License
* Version 1.0 ("License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.vyatta.com/vpl
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* This code was originally developed by Vyatta, Inc.
* Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
* All Rights Reserved.
*
* Author: Michael Larson
* Date: 2007
* Description:
*
* **** End License ****
*
*/
#include <sys/time.h>
#include <time.h>
#include <iostream>
#include "lbdata.hh"
int LBHealthHistory::_buffer_size = 10;
/**
*
*
**/
void
LBHealth::put(int rtt)
{
int activity_ct = _hresults.push(rtt);
if (rtt == -1) {
if (activity_ct >= _failure_ct) {
if (_is_active == true) {
_state_changed = true;
}
_is_active = false;
}
}
else {
if (activity_ct >= _success_ct) {
if (_is_active == false) {
_state_changed = true;
}
_is_active = true;
}
}
}
/**
*
*
**/
LBHealthHistory::LBHealthHistory(int buffer_size) :
_last_success(0),
_last_failure(0),
_index(0)
{
_resp_data.resize(10);
for (int i = 0; i < _buffer_size; ++i) {
_resp_data[i] = 0;
}
}
/**
*
*
**/
int
LBHealthHistory::push(int rtt)
{
struct timeval tv;
gettimeofday(&tv,NULL);
if (rtt == -1) {
_last_failure = tv.tv_sec;
}
else {
_last_success = tv.tv_sec;
}
_resp_data[_index % _buffer_size] = rtt;
++_index;
//compute count of sequence of same responses
int ct = 0;
int start_index = (_index - 1) % _buffer_size;
for (int i = 0; i < _buffer_size; ++i) {
int index = start_index - i;
if (index < 0) {
//handle wrap around of index here
index = _buffer_size - index;
}
if (_resp_data[index] == -1 && rtt == -1) {
++ct;
}
else if (_resp_data[index] != -1 && rtt != -1) {
++ct;
}
else {
return ct;
}
}
return ct;
}
/**
*
*
**/
bool
LBData::is_active(const string &iface)
{
InterfaceHealthIter iter = _iface_health_coll.find(iface);
if (iter != _iface_health_coll.end()) {
return iter->second._is_active;
}
return false;
}
/**
*
*
**/
void
LBData::dump()
{
cout << "health" << endl;
LBData::InterfaceHealthIter h_iter = _iface_health_coll.begin();
while (h_iter != _iface_health_coll.end()) {
cout << " " << h_iter->first << endl;
cout << " " << h_iter->second._success_ct << endl;
cout << " " << h_iter->second._failure_ct << endl;
cout << " " << h_iter->second._ping_target << endl;
cout << " " << h_iter->second._ping_resp_time << endl;
++h_iter;
}
cout << endl << "wan" << endl;
LBData::LBRuleIter r_iter = _lb_rule_coll.begin();
while (r_iter != _lb_rule_coll.end()) {
cout << " rule: " << r_iter->first << endl;
cout << " " << r_iter->second._proto << endl;
cout << " " << r_iter->second._s_addr << endl;
cout << " " << r_iter->second._s_net << endl;
cout << " " << r_iter->second._s_port_num << endl;
cout << " " << r_iter->second._s_port_name << endl;
cout << " " << r_iter->second._d_addr << endl;
cout << " " << r_iter->second._d_net << endl;
cout << " " << r_iter->second._d_port_num << endl;
cout << " " << r_iter->second._d_port_name << endl;
LBRule::InterfaceDistIter ri_iter = r_iter->second._iface_dist_coll.begin();
while (ri_iter != r_iter->second._iface_dist_coll.end()) {
cout << " interface: " << ri_iter->first << endl;
cout << " weight: " << ri_iter->second << endl;
++ri_iter;
}
++r_iter;
}
cout << "end dump" << endl;
}
/**
*
*
**/
bool
LBData::state_changed()
{
LBData::InterfaceHealthIter h_iter = _iface_health_coll.begin();
while (h_iter != _iface_health_coll.end()) {
if (h_iter->second.state_changed()) {
return true;
}
++h_iter;
}
return false;
}
/**
*
*
**/
void
LBData::reset_state_changed()
{
LBData::InterfaceHealthIter h_iter = _iface_health_coll.begin();
while (h_iter != _iface_health_coll.end()) {
h_iter->second._state_changed = false;
++h_iter;
}
}
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